Transcript for Tracy Morgan Expected to Recover After Deadly Accident in New Jersey

And next here tonight an update and comedian Tracy Morgan after the devastating accident on the New Jersey highway this weekend he remains in critical condition. Today the calls to 911 -- been made public. ABC's GO but he says now tells us the chain reaction accident may have been caused by -- growing danger on America. -- Tonight prosecutor saying the accident that left comedian Tracy Morgan in the hospital. Was caused by a truck driver who may not have slept in more than 24 hours 1 AM Saturday morning Tracy Morgan and team in this limo stopped in traffic. Behind them police say a Wal-Mart truck moving way too fast swerves and slams into Morgan's limo overturning it. -- -- -- -- -- -- -- Tracy Morgan is best known for playing a pampered TV star on thirty -- -- -- a -- -- I did not ask for. -- me tonight he's in critical condition -- writing partner killed in the crash. Kevin -- the 35 year old -- -- now facing criminal charges bringing new attention to the rising number of big -- crashes. 3171000. In 20120. Driver fatigue is said to be a leading factor before last year truck drivers were allowed to work 82 hours a week. New federal rules cut that number to seventy hours most Americans work forty hours a week they're not driving all eighteen wheelers Daphne -- -- has been fighting to call attention to this problem for twenty years. Ever since her son Jeff died when his car was hit by a truck whose driver fell asleep at the wheel. Highways and got to be made safer. Everybody's family is at risk out there tonight Wal-Mart saying the driver Friday's crash was -- operating under the federal guidelines the question. Do those guidelines go far enough. Trucker after trucker at the -- -- telling us they don't get enough sleep Paul Bailey has been driving trucks for 21 years. You sleep with the money and time. -- -- refused monies yet because again they -- you -- at the moment my Lemanowicz. Another thing Daphne Eisner says must change to avoid more tragedies like this. GOP -- has ABC news New Brunswick, New Jersey.

This transcript has been automatically generated and may not be 100% accurate.

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